Locomotive or other furnace



(No Mo"de1.)

No. 528,588. Y

Petented NOV.n 6, 1894.

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R. H. BROWN..4 LUGOMOTIVB 0R OTHER FURNAGB.'

No. 528,588. Patented-Nov. 8, 1894.rv

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UNITED STATES" PATENT OFFICE,

RICHARD BROWN, O'FfST. LOUIS, MISSOURI.

LoooM-o'rlvlz` Onofri- IER FURNACE.

SPECIFICATION forming part of Letters Patent No. 528,588I dated November 6, 1894. Application filed February 19, 1894. Serial No. 500,604. (Nov model.)

To a/ZZ whom it may concern.-

Beit known that I, RICHARD H. BROWN, of St. LouisMissouri, have made a new and useful Improvement in Locomotive or other Furnaces, of which the following is a full, clear, and exact description.

This invention has for its object to provide an improved mode of abating the smoke and more thoroughly consuming the fuel of a furnace, and especially of a locomotive furnace, and it consists mainly in the provision whereby, in firing,'the fresh fuel lis applied to the forward portion of the tire, and the products of combustion therefrom are prevented from escaping directly from the furnace or tirebox and are lcaused to wind through a lue formed in the lire-box and to bedirected onto the brighter portion of the fire at the rearward end of the lire-box and thereby more thoroughly consumed, substantially as is hereinafter set forth and claimed, aided bythe annexed drawings, exhibiting a desirable mode of carrying out the improvement, and making part of this specification, and in which-- Figure 1 isa vertical, central, longitudinal section of a locomotive having the present improvement embodied therein; Fig. 2, a vertical cross section on the line 2-2 of Fig. l; Fig. 3, a detail upon an enlarged scale, being a view of the damper in part and including one of the damper-bearings; Fig. 4, a to p edge view of the middle portion of the damper, and Fig. 5 a section on the line 5 5 of Fig. 3,

The same letters of reference denote the same parts.

A represents a locomotive of ordinary construction saving as it is modified or supplemented by the improvement under consideration. Only that portion of the construction that is needed for an understanding of the improvement is exhibited.

B represents the fire-box of the locomotive; O, the grate of the lire box; D, the doorway to the re-box, and E the flues leading from the lire-box.

F represents a descending ue formed in the fire-box. It extends across the lire-box between the'forward and rearward ends thereof and it is contrived so that the products of combustion from the forward portion of the lire can enter it at or toward the upper end thereof and pass downward through it to encounter the rearward portion of the fire before escaping from the fire-box. A desirable mode of constructing the due is shown in the drawings.

G represents a diaphragm extending across the fire-box and leaving a space,f, above it to form the inlet to the ue F, and also leaving a space g beneath it and above the level of the vtoplof the fire.

a I-I represents another diaphragm extending across the fire-box in rear of the diaphragm G and extending from the top b of the fire box downward toward the portion of the fire-box occupied by the fuel I, but leaving a space, h, between itand the top of the fire, substantially as shown.

J represents a damper adapted for closing when desired the space g between the diaphragm G and the fire,substantial1y as shown. While the damper may be otherwise operated for the purpose iny question it is preferably made in the form of a revolving damper whose movement is indicated by the broken line j, and it is arranged so that, when closed, its upper edge meets the diaphragm G and its lower edge the fire, and it can be upturned against the rear side of the diaphragm G to leave open both the space g and the flue F.'

In the present instance the damper is journaled in the vside-walls of the fire-box as shown in Figs. 2 and 3, the damper being provided with journals j', jz which are held, and are adapted to turn, in the hollow rivets or bolts js, ji, which, in the present instance, pass through the'flange g of the diaphragm G, and thenthrough the shell b of the rebox, the water-space a, and the outer shell a of the locomotive, and secured substantially as shown. To enable the damper to be readily inserted and withdrawn it is made in parts, j, 9'6, and j7, which are detachably united by means of the screws jsubstantially as shown.

The diaphragme, G and H, may be constructed and supported in position in any desirable manner. They may, for instance, be of brick or other refractory material; but,

and partly for the purpose of increasing the v IOO heating surface of the construction, I prefer to make them in theform of hollow water chambers whose interiors communicate with the water space of the boiler-that is, the interior ofthe diaphragm G communicates cially when fresh fuel is introduced.

at its ends with the water spaces a, a, and the interior of the diaphragm I-I communicates with the same water-spaces and is also open at its upper edge to communicate with the overhead water space 0.2 of the boiler.

The operation of theimproved construction is as follows: In starting the fire the damper may be upturned to provide a direct draft from the forward as well as from the rearward portion of the fire; but after the fire is under way, and especially when it is desired to introduce a fresh lot, i, of fuel, the fuel already in the fire-box, and which is now incandescent, is pushed rearwardly in the fire-box and is more or less heaped up and accumulated at and toward the rearward end of the fire-box, substantially as is indicated at 1I', and the damper is turned down to close the direct escape from the forward portion of the fire. This position is substantially shown in Fig. l. The course of the gaseous current from the forward portion of the tire is now rst upward toward the roof of the fire-box and thence into and downward through the ue F and thence onto the incandescent portion of the lire at the rearward part of the fire-box, and after meeting such incandescent portion the course is upward into the iiues E, substantially as is indicated by the arrows The result is a very thorough consumption of what is otherwise an unconsumed portion of the fuel and a very thorough abatement of the smoke from the lire-box. This operation of shifting the Iire rearwardly in the fire-boX-and closing the damper is repeated as often as may be needed and espe- The described diaphragme and fine are to a certain extent useful whether the described damper is or is not employed. It is however prefer- The diaphragm G is useful as a means for directing the products of combustion from the forward portion of the fire well upward toward the top of the re-hox, and itf also serves to protect (when the parts are relatively arranged as in the present illustration) the upper portion of the damper from the fire; but the damper, in combination with the diaphragm H, is useful irrespective of the diaphragm G, as it, the damper, when turned down serves to hinder the direct escape from the forward portion of the fire and in conjunction with the diaphragm I-I to form a portion of a flue that directs the products of combustion downward toward the rearward portion of the fire; and when used without the diaphragmit can be extended higher upward inthe fire box than as shown in the present illustration. y

K represents a wrench for operating the damper.

l. In a locomotive or other furnace a descending flue arranged between the forward end and the rearward end of the furnace substantially as described incombination with a damper for closing the direct escape from the forward portion of the furnace into the lower end of said fine.

2. In a locomotive or other furnace the combination of the diaphragms and the damper, said diaphragme being arranged to form a descending iiue in the middle portion of the fire place, substantially as described.

3. In a locomotive or other furnace the combination of the damper and the diaphragm G, said damper being at the lower end of said diaphragm substantially as described.

Vitness my hand this 17th day of February, 1894.

RICHARD I-I. BROWN.

\Vitnesses:

C. D. MOODY, A. BoNvrLLE. 

